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Malachite Chrysocolla & Calcite

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BMM598861

Malachite Chrysocolla & Calcite

Description Tabs

Description
Locality: 
Rotenstein Mine, Ringenwechsel, Schwaz District, Tyrol, Austria
Class: 
Crystals on Matrix
Size Range: 
Cabinet (10-18 cm)
Size: 
13.8 × 7.7 × 3.4 cm
Description

A very rare sample from this Austrian location: turquoise colored malachite and dark green chrysocolla. The malachite  and the chrysocolla looks molten and that makes this piece even more interesting. There are also bright and lustrous calcite skalendoeder grown on the specimen. They are also partially covered with malachite. The specimen has been professionally stabilized. A very rare and interesting piece, all in all!

Mineral Data
What's on the rock

Malachite

Formula: 
Cu2(CO3)(OH)2
Strunz: 
5.BA.10
Crystal System: 
Monoclinic
Hardness: 
3.5 - 4.0

Chrysocolla

Formula: 
Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O (x < 1)
Strunz: 
9.ED.20
Crystal System: 
Monoclinic
Hardness: 
2.5 - 3.5

Calcite

Polymorph of: 
Formula: 
CaCO3
Strunz: 
5.AB.05
Crystal System: 
Trigonal
Hardness: 
3.0
Streak: 
White